Need help!!!

[the727kid 1]

Alright I am trying to figure out a design for my car. Box is for 2 15" Nightshades, with tons of power, Jacob said I only need 2.5 cubes per sub.

Anyways my dimensions are 30" deep, 16" tall and 31" wide. Only way really to fit this is if I do subs up. Now I wanted to do external aero ports blowing right into the car, but that won't fit. So now I am thinking A. aero ports blowing in but internal, b. aero ports blowing to the side, but internal, c. regular port facing in, d. regular port to the side, e. regular port to the rear.